Unity:allowAttachedObjectの条件を満たさないオブジェクトにはアタッチできないスクリプト

DestroyMine.cs

using System.Collections;
using UnityEngine;

public class DestroyMine : MonoBehaviour
{
    private static GameObject allowAttachedObject;

    private DestroyMine()
    {
    }

    private void Awake()
    {
        allowAttachedObject = GameObject.FindGameObjectWithTag("Player");
    }

    private void Start()
    {
        if(allowAttachedObject != this.gameObject)
            Destroy(this);
    }
}